The purpose of this study was to investigate the intratester and intertester reliability of the Cervical Range of Motion instrument (CROM) for measuring cervical flexion, extension, lateral flexion, and rotation. Twenty able-bodied subjects were tested by two testers on two different occasions. Pearson product-moment correlations for intratester reliability ranged from .63 to .90 for tester one and from .62 to .91 for tester two. Intertester reliability was good. Coefficients ranged from .80 to .87 for session one and .74 to .85 for session two. Paired data t-tests showed that there were no significant differences between testers or sessions (p = .01). The results suggest that the CROM has acceptable intratester and intertester reliability. The CROM has many benefits including ease of application and reliability. More research is needed on patients with cervical dysfunction.